Chemical formulae and equations Flashcards
what are the chemical formulas for ammonium, silver, zinc, hydroxide, nitrate, sulfate, carbonate? (not in periodic table)
Ammonium: NH4+
Silver: Ag+
Zinc: Zn^2+
Hydroxide: OH-
Nitrate: NO3-
Sulfate: SO4^2-
Carbonate: CO3^2-
how can the chemical formulae of ionic compounds be obtained?
they can be obtained by balancing the charges of the ions
which elements are diatomic in the periodic table?
hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine, astatine
what are the chemical formulas for these covalent substances, ammonia, sulfur trioxide, nitrogen monoxide?
NH3, SO3, NO (all compounds)
what do the ionic charges represent?
they represent how many electrons the atom has to gain or lose to attain full valence shell
which elements usually share electrons instead of gaining or losing electrons?
group 14 elements
which elements already have full valence shells?
group 18 elements (noble gases)
which atoms are polyatomic?
(not in periodic table)
ammonium, hydroxide, nitrate, sulfate, carbonate
Which elements in the periodic table forms cations with a charge of +1?
Group 1 elements
Which elements in the periodic table forms cations with a charge of +3?
Group 13 elements
Which elements in the periodic table forms anions with a charge of -3?
Group 15 elements
Which elements in the periodic table forms cations with a charge of +2?
Group 2 elements
Which elements in the periodic table forms anions with a charge of -2?
Group 16 elements
Which elements in the periodic table forms anions with a charge of -1?
Group 17 elements
